LTRR | Laboratory of Tree-Ring Research

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Please visit https://ltrr.arizona.edu/docents for additional information.

Established by the pioneer of dendrochronology.
A.E. Douglass, originator of the science of tree-ring dating, founded the Laboratory of Tree-Ring Research in 1937.
https://ltrr.arizona.edu/about/history
Housed in a custom facility.
A building constructed in 2013 includes lab, office and archive space
https://ltrr.arizona.edu/building
Pursuing interdisciplinary research.
Dendrochronology helps reconstruct environmental change, and unravel processes in ecosystems and human societies; researchers in many parts of the world collaborate with the Laboratory of Tree-Ring Research.
https://ltrr.arizona.edu/research
Hosting an on-line seminar series.
The Tree Ring Talks seminar series is now available on Zoom.
Upcoming talks ≫

Established by the pioneer of dendrochronology.
Housed in a custom facility.
Pursuing interdisciplinary research.
Hosting an on-line seminar series.

News

NASA Solar Dynamics Observatory image of a prominance.

A huge solar eruption hit the Earth between 664 and 663 BCE

Thursday, December 19, 2024

Irina Panyushkina of the LTRR has led a team elucidating more details of the huge solar eruption that hit the Earth around 664 BCE.

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A cross section from a tree that drowned when a forest was carried into Lake Washington as part of a landslide.

Tree rings reveal a new kind of earthquake threat to the Pacific Northwest

Wednesday, September 27, 2023

New paper by LTRR lead author Bryan Black

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AGU web page for Willi Dansgaard Award with Kevin Anchukaitis portrait inset

Kevin Anchukaitis receives Willi Dansgaard Award

Friday, September 15, 2023

The AGU honors Kevin Anchukaitis with the 2023 Willi Dansgaard Award.

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Sediment core tube held in a small boat on a lake.

Has the Earth been warming or cooling over the past few thousand years?

Thursday, February 23, 2023

LTRR postdoc Ellie Broadman is co-author of an article reviewing the trends in global temperature over the last few thousand years.

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Music from Tree Rings

Monday, December 19, 2022

The Arizona Daily Star newspaper's front page lead article was on the musical collaborative project featuring Margaret Evans and Kelly Heilman of the LTRR.

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